Glad to see that you most likely found the source of the problem!baldeagle wrote:I found the answer, I think. I found this post, http://sigforum.com/eve/forums/a/tpc/f/ ... /749101723, at the Sig Forum site:I checked all three mags. All three push the slide catch lever up properly, but, you can insert the new mags into the pistol without "locking" them in place. They seem to be in place and they won't fall out, but they're not locked in place.Checks: with the slide off the pistol, lift the slide catch lever; it should be under spring tension and should smartly return to it's rest position when released. (If it doesn't, the slide catch lever spring is broken or missing). Insert an empty magazine and ensure that the follower of the mag lifts the slide catch lever up. With an assembled pistol with slide forward, insert an empty magazine and rack the slide to the rear; the slide should remain locked back.
If I push the mag up into the receiver it seems to be in place. The slide catch lever is moved up, but not far enough to lock the slide. If I push the mag with a little more force, there is a clicking sound when the magazine hits the catch stop and the slide catch lever pops up far enough to lock the slide back. So I most likely did not insert the mag all the way into the frame enough to lock it. Next time I go to the range I'll make sure that every mag is properly locked in place.
That may also explain the jamming issue I had with that mag.
Yes, newish mags can be a tight fit, and I have experienced mags seeming like they're all the way in, when they're really not before.
A little more use and they might slide and lock in easier, with less force required
